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The WDSU I-Team broke the story last month that a prosecutor was blogging online about the case. That prosecutor, Sal Perricone, has since resigned.

"Following consultation with the Department of Justice in Washington, D.C., the United States Attorney's Office for the Eastern District of Louisiana determined that it would be appropriate to request recusal in any matters involving River Birch, and also in the cases involving U.S. v. Titus, U.S. v. Mouton, and U.S. v. Fazzio. Recusal is a time-tested practice to avoid even the appearance or allegation of a conflict of interest in the investigation and prosecution of cases and in this case is not an indication of any impropriety or misconduct on the part of the United States Attorney's Office," Letten said in a statement on Friday afternoon.

The office said that the matters will continue to be handled by the FBI and the IRS. Legal action will be handled by the Public Integrity Section of the Criminal Division of the United States Department of Justice.

The Department of Justice has allowed Assistant United States Attorney Greg Kennedy to continue to be assigned to the matter under the supervision of the Public Integrity Section.